- Do you have the Addon Manager AND the Couatl powered products menus inside FSX ? Do you have both, only one, or none at all ? YES I HAVE BOTH
You could have stopped there, because the usual questions are only made to diagnose the most common problem, which is the antivirus blocking the software running, which result in no Addon Manager or Couatl menus so, if you have both, you can safely discount anything related to the antivirus.
I downloaded the LAX trial version about a week ago, which worked fine.
Over the weekend, I migrated by PHNL scenery from FS9 to FSX - that took a while to get working, but I finally worked it out.
I then purchased LAX, and now cannot see any buildings - only Jetways.
What do you mean with "migrating PHNL scenery from FS9 to FSX" you can't migrate anything, there's no way to use the FS9 version in FSX, you have to use the FSX installer, which simply installs the scenery without having to do anything on your part.
The activation will stay without having to do anything on your part, unless you reinstalled Windows from scratch, or changed hardware, or run FSX on a different system. In that case, you would need to reactivate, we can't be simpler, just select "Register Serial" and insert the same Serial Number you used for FS9.
So, fact that you are saying that you "migrate" PHNL and took a while to get it working, seems to indicate you must have done something strange, like trying to run the FS9 version under FSX or so, because otherwise it would only needed to simply download and install the PHNL FSX installer.
Since it's not clear what you have done by migrating PHNL, reinstalling KLAX should fix everything, and be sure you use the current 1.1 version.